Dahle Vantage 10673 Self-Healing Cutting Mat, 24"x36", 1/2" Grid, 5 Layers for Max Healing, Perfect for Cropping, Sewing, & Crafts, Black 24" x 36" Black Cutting Mat Black Self healing properties allow for max durability 1/8" (3mm) thickness protects work surface from being damaged Preprinted 1/2" grid for easy sizing of paper